#!/usr/bin/node

const EventEmitter=require('events').EventEmitter,
      log=console.log,
       e=new EventEmitter();

setInterval(()=>{
  e.emit('hello');
},1000);


setTimeout(()=>{
  e.emit('bye');
},5000);

e.on('hello',()=>{
  log('hello world');
});//hello event
e.on('bye',()=>{
  log('bye');
  process.exit();
});
